<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="/login" method="post">
    用户名<input type="text" name="username"><br>
  密码<input type="text" name="password"> <br>
  <input type="submit" value="登录">
   </form>
</body>
</html>